Question re: Blanket layout

[gone_fishing]

OK. I have a secondary journal that is currently sporting Blanket as its layout. Thanks to looking through the archives on this community, I was able to upload an image header via CSS as well as take off the title/subtitle/recent entries. My question is now: what CSS would I plug in to remove the border from the header on Blanket? It's cutting into the image and looks... awkward. (And I've seen other people with this layout, with a picture header and no border.)

Thanks in advance! <3